Consolidate tenancy validation functionality into scheme validation

app/models/scheme.rb

@@ -299,7 +299,7 @@ class Scheme < ApplicationRecord
     active? && locations.active.exists?
   end
 
-  def any_location_active_on_date?(date)
+  def has_active_locations_on_date?(date)
     return false unless date
 
     locations.any? { |location| date && location.active_on_date?(date) }

app/models/validations/shared_validations.rb

@@ -82,16 +82,9 @@ module Validations::SharedValidations
       record.errors.add :startdate, I18n.t("validations.setup.startdate.scheme.#{scope}.startdate", name: record.scheme.service_name, date:, deactivation_date:)
       record.errors.add :scheme_id, I18n.t("validations.setup.startdate.scheme.#{scope}.scheme_id", name: record.scheme.service_name, date:, deactivation_date:)
     end
-  end
-
-  def tenancy_during_startdate_validation(record)
-    return if record.startdate.blank?
-
-    if record.scheme.present? && !record.scheme.any_location_active_on_date?(record.startdate)
+    if record.scheme.present? && !record.scheme.has_active_locations_on_date?(record.startdate)
       record.errors.add :startdate, I18n.t("validations.setup.startdate.scheme.locations_inactive.startdate", name: record.scheme.service_name)
-    end
-    if record.location.present? && !record.location.active_on_date?(record.startdate)
-      record.errors.add :startdate, I18n.t("validations.setup.startdate.location.deactivated.startdate", postcode: record.location.postcode)
+      record.errors.add :scheme_id, I18n.t("validations.setup.startdate.scheme.locations_inactive.scheme_id", name: record.scheme.service_name)
     end
   end
 

config/locales/en.yml

@@ -302,6 +302,7 @@ en:
             scheme_id: "The scheme %{name} is not available until %{date}. Select another scheme or edit the tenancy start date"
           locations_inactive:
             startdate: "The scheme %{name} has no locations that are active on this date. Enter another date or choose another scheme."
+            scheme_id: "The scheme %{name} has no locations that are active on this date. Enter another date or choose another scheme."
       owning_organisation:
         invalid: "Please select the owning organisation or managing organisation that you belong to"
         data_sharing_agreement_not_signed: "The organisation must accept the Data Sharing Agreement before it can be selected as the owning organisation."